OEM Carrier Flame Sensor 50HJ401431 for Model PY1RPA048074AAWB

This is the genuine OEM Carrier flame sensor (part# 50HJ401431), factory-specified for the Carrier PY1RPA048074AAWB packaged gas/electric unit. The flame sensor — also called a flame rod — monitors the burner to confirm active combustion during each heating cycle. When it detects a flame, it passes a small electrical signal back to the control board to keep the gas valve open. When this sensor fails or becomes coated with oxidation, the control board cannot confirm ignition and will shut the gas valve after just 5–8 seconds as a critical safety measure, causing the unit to lock out after several failed attempts. The symptom is unmistakable: the burner lights briefly, then the system shuts off and often repeats 2–3 times before going into lockout.

• Specs: OEM part# 50HJ401431 | Stainless steel sensing probe | Alumina-coated rod | Dimensions: 2.9" W × 4" D × 1.75" H | Weight: 0.09 lbs | Compatible with 24V AC control circuits
• OEM vs Generic: This is a genuine Carrier OEM sensor — not an aftermarket substitute. OEM sensors are calibrated to the exact microamp sensitivity range required by the Carrier control board. Generic sensors often fall outside spec, causing nuisance lockouts or unsafe operation.
• Install Difficulty: 2/5 — Turn off power and gas before servicing. Tools needed: 1/4" hex driver or nut driver, needle-nose pliers. Disconnect the single wire lead, remove the mounting screw, and swap the sensor. Lightly sand oxidation from the rod before installing if troubleshooting; replace if resistance testing shows out-of-spec microamp reading.
• Warranty: 1-year OEM manufacturer warranty. In stock and ships the same business day from our warehouse.

Compatibility: Designed as the factory-replacement flame sensor for the Carrier PY1RPA048074AAWB packaged unit. Always verify the OEM part number on your existing sensor or equipment data plate before ordering. Our parts specialists are available to confirm fitment — reach out before you buy if you have any questions. Order today and get same-day shipping on in-stock parts.